Dipper attachment for steam shovels and the like



R. H. LUTZ.

vDIEPER ATTACHMENT Foa STEAM sHovELS AND THE LIKE.

APPLICATION FILED APR. 10, 1920.

lPatented Mar. 21, 1922.

3 SHEETS-SHEET l.

`o I IUIIHIIII R. H. LUTZ.

DIPPER ATTACHMENT Eon DTEAN sHovELs AND THE LIKE.

- APPLICATION FILED AAIII. Io, T920. Patnted Mar. 21 1922 3 SHEETS*SHEET 2i I/v vf/voR. RoE/-TTH Lurz.

R( H. LUTZ. v DIFFER ATTACHMNT FOR STEAM SHOVELS AND THE LIKE. `APPuc/mow man APR. 0. 1920.

1 ,4 1 0,20 Patented Mar. 21, 1922.

3 SHEETS-SHEET 3.

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INvENToR Rober)l H. LU'Z 7% /ZV/V l UNITED STATES ROBERT HAMILTON LUTz, or NIAGARA FALLS, ONTARIO, CANADA'.

DIPPER ATTACHMENTFOR STEAM SHVELS AN D THE LIKE.

Specification of Letters Patent.

Patented Mar. 2i, 1922.

Application-filed April 10, 1920.- Serial No. 372,903.`

Be it known that I, ROBERT HAMILTON LUTZ, of the city of Niagara Falls, in the county of llelland, Province of Ontario, Dominion of Canada, have invented certain new and useful Improvements inDipper Attachments for Steam Shovels, and the like, of which the following is the specification.

My invention relates to improvements in clipper attachments for steam shovels, and the like, and the object of the invention is tor devise a means ofV tiltingthe clipper from the, position occupied while digginggso" that large stones or other material which are too large to pass downwardly through the dipper may be dumped over the, top edge thereof; a further object is to provide means for locking the dipperin the digging position when desired. y

My invention consists of a steam shovel having theusual main beam carrying the clipper arm and operating mechanism therefor, a clipper hingedly connected at the lower end thereof to the clipper arm, a crosshead bearing i-n suitable guides carried by the clipper arm, a connecting rod journal-led in the crosshead at one end and at the other end in brackets carried at. the upper end of the clipper, a ram securedto the crosshead at the end remote from the aforesaid connecting rod, means for reciprocating' the ram and means. for locking the crosshead in its eXtreme inward position all as more particularly described and illustrated in they accompanying drawings in ywhich Fig. l is a general side elevation of my invention applied to the clipper arm of a steam shovel, the clipper being shown in the tilted position in dott-ed lines.

Fig. 2 is a plan'view of the tilting mechanism. (The Acrosshead being shown in the extended or tilting position in dotted lines.)

Fig. `3 is a side elevation of seme With a portion shown in sectionlon the line 3, 3 of Fig. 2.

Fig. 4is a section on the line 4, 4 of Fig. 2.

Fig. 5 is a section on they line 5, 5 of 2. n ig. 6 is a plan` view ofja modification of my invention. V y f i Fig. 7 7s Van elevation thereof withapor- V tionbroken away to show asection on the line 7 ,"iof Fig. 6.' j Y Fig. 8 is a side elevation showing the motor for operatingthe pinion driving the dipper arm and also a'drum upon which the electric wires are wound, these'being carried upon the main beam which is'shown in section.

Like characters of reference indicateicorresponding parts in the `dilferent views.

1- is'the .main beam connected to the carriage 2 in the usual manner by` a hinge;

4 is the dipper arm constructed of two I-beams and is mounted in the main beam iny the usnalmanner and operatedby the rack and pinion 5 and 6. The; pinion 6 is mounted on the shipper shaft 61 and is-operated by a :motor 7. f

8 is the clipper which is khinged to the clipper arm `by the hingeconnection 9. 10 isv the bottom door ofthe dipper hingedly `.connected thereto.

11 is. a supporting yoke pivotally carried by the clipper and 12 is a pulley connected thereto. 13 is the hoisting chain which is secured to the sheaf 14 of the pulley12, passes over the pulleys 15 and 16' carried by the main beam, the pulley 17 carried by the carriageand is finally wound on the drum 16 which is operated from the main driving motor (not shown). n

1 9 is a crosshead sliding in guides 2O and 2l secured'to the upper face ofthe dipper arm by the bolts` 22 andk separated by the spacer 23. l

24 is a connecting rod journalled at one end to the top `of the dipper byy means of the yoke-end 25, the brackets 2li-and the pin 27 and journalled at the other end to the crosshead by means of the yoke-end 28 and the pin29.

30 is a ram supported in brackets 3l se- Cured. to the upper face .of the clipper arm by the bolts 32. The ram is provided with the worm 33 and is, Secured to the crosshead by the strap34 and the bolts 35.

36 is an electric motor `mounted on the dipper 4arm and 37 is a shaftdriven thereby and carrying the `pinion 38. 39 is a wheel havinguan axial orifice therethroughand is revolubly mount-ed Von the ram 30.l The worm `-33 on the .ram 4,engages `an internal f wormthreadlt() on the 1wheelv39. The 'wheel 39 has external spurteeth 41 which mesh withv the spur pinion ,38. 42and `43 are annular thrust platesfreely mounted on the .ram atleach side the-wheel 3,9.y

l" sov per is returned to the digging positionlby 44 are the electric Wires tothe motor 86. The shipper shaft 61 carries a drum (52 of the same diameter as the pinion 6 for a purpose as will appear hereinafter.

45 is a steam cylinderhaving the piston 46 which is attached to the crosshead 19. 47 are brackets supporting the steam cylinder and secured to the upper face of the dipper arm by the bolts 48. 49 isal flexible steam pipe leading to the cylinder 45.

' 50 are 'Z-shaped locking pins each having t-he "upwardly extending arm 51 and the de'- pending`a1m52. 53 is a shaft extending transversely of the dipper arm and having the locking pins 50' freely mounted on its ends.

The crosshead guides 20 and 2l have orices 54 and 55 extending therethrough and into which the arm 51 of the locking pinis adapted to enter for a purpose as will appear hereinafter.

56 is a cord attached to the lower end of the depending arm 52 andextending to the controlplatform of the shovel. 57 `is a coil spring having one end iXed to the dipper arm and the other endto the lower end of vthe Vdepending arm `52.

58 isa piece of rock in the mouth of the dipper which is too large to `pass com-Y pletely into the dipper. 59 is a portion of a railway truck into Which the shovel is dumping. y l

The operationV of my Iinvention is as follows: ".1 i

` When the dipper is in the digging position the crosshead is at the eXtreme inner end. of its travel and is heldin this position, since the ram 30 cannot move until the motor 36 is' operated. `This position of the dipper is similar to' that of the 4ordinary ltype and in it the dipperis almost perpendicular tothe dipper arm. y

My dipper is dumped ordinarily ,in exactly the same manneras in the standard type, the contents of the dippersimply falling out through the bottom door l0.

It frequently happens however that large pieces of rock are carried up which cannot Vpass through the dipper. In this case they can be readily dumped from my dipper by tilting same into'the position shown in dotted lines of Fig. 1.

This is accomplished as kfolloivsg-` The motor 36 is operated which Vrotates thefshaft 37 and pinion 38. This in turn `rotates the Wheel 39` which through its internal Worm 40 and the Worm A33 onthe ram reciprocates the. latter thus moving f the crosshead 19 outwardly and through the connecting rod24 tilting the dipper. "Thev dipreversing the motor 36.

"The th" ust of the Wheel 395s take'iiby the thrust plates V42 and 43...: y y i It will `be readily seen thatthe dipper is, at all times, locked unless the. motor is operating.

The operation of the lnainbeam 1 tollows standard. practice and Will not therefore lbe described. l

In order that the' slack produced in the .Wires 44 due to the operation of the dipper arm will be taken care of, I provide a drum ixed on the shipper shaft 61, of the same diameter as the pinion 6 and about which these Wires are Wound. As the dipper arm `is moved in either direction Aby the pinion case With the Worm device previously described7 it is necessary to provide some means of locking it inthe digging position.

This is accomplished as Yfolloivsj-f- Locking pins 50` are carried at each side of the dipper arma-nd are pivotally connected thereto at 53. lThe crosshead guides 20 and 2l are provided With registering orilices 54 and 55 into Which the arm 5l, of the locking pin is adapted to extend. The ori iices are so disposed that thecrosshead uncovers them just as it reaches the extreme inner end of -its travel. At this point the dipper is in the ldigging position.

The coil spring 57 normally'holds the arms 5l Within the orifices. 56 isa cord Which extends to the control plat-forni of the shovel and by pulling it the craneman can Withdraw the locking pins from the orifices as desired.

It will be seen that, When the crosshead is at the inner point of its travel and the arms 5l areV extending through the oriiices 54 and 55 the ciosshead is lockedin this position, which in turn locks the dipper in the digging position.

H`tlierto the dipper has been lixedl'y connected to the dipper arm and there has been no provision for altering the inclination oi' the dipper with respectto the dipper arm.

lInvthisv construction the dumping is` done lentirelythrough the bottom and all ymaterialv the dipper as there is no" provision made for dislodging pieces picked up Whichfaie toolarge to pass through.

ThisA naturally involvesj greater expense Vin blasting' rand also considerable time is Wasted 1n picking up large pieces which connot be dumped.

By the use of my invention however these vdiiliculties are entirely overcome and it will therefore be seen that I have devised improvements in dipper,attachments which will very greatly increase the economy and efficiency of steam shovels and the like.

Many modifications may be made in my invention Without departing from the spirit of the same or the scope of the claims and the forms shown are to be taken as illustrative and not in a limiting sense.

For instance While I have shown the pinion 38 as meshing direct With the gear Wheel 39 I might insert intermediate gears between these two to control the drive.

Also various methods of taking care of the slack in the electric Wires to the motor might be used, such as a trolley pole and Wheel over which the Wires Would pass.

What I claim as my invention is:

l. In a steam shovel, a dipper arm, a dipper hingedly connected to one end thereof, a crosshead mountedin guides carried by the dipper arm, a connecting rod journalled at one end to the dipper and at the other end to the crosshead, a ram supported in braclc ets carried by the dipper arm and having one end co-acting with the crosshead, the ram having an external thread formed thereon, a Wheel mounted on the ram having an internal thread engaging the thread on the ram, thrust bearings at either side of the Wheel and means for rotating the wheel.

2. In a steam shovel, a dipper arm, a dipper hingedly connected to one end thereof, a crosshead mounted in guides carried by the dipper arm, a connecting rod journalled at one end to the clipper and at the -other end to the crosshead, a ram supported in brackets carried by the dipper arm and having one end co-acting with the crosshead, the ram having an external Worm formed thereon, a Wheel mounted on the ram having an internal Worm thread engaging the Worm on the ram, thrust bearings at either side of the wheel and means for rotating the Wheel.

3. In a steam shovel, a clipper arm, a dipper hingedl connected to one end thereof, a crosshea mounted in guides carried by the dipper arm, a connecting rod journalled at one end to the dipper and at the other end to the crosshead, a longitudinally disposed ram supported in brackets carried by the dipper arm and having one end secured to the crosshead, the ram having an external Worm formed thereon, a Wheel having an internal Worm thread, external spur teeth upon its peripheral face, the Wheel mounted on the ram and the internal thread thereof coacting With the worm on the ram, a motor, a shaft rotated thereby, a spur pinionfixedly carried by the shaft and co-acting with the external spur teeth on the Wheel, and thrust f bearings at either side of the wheel.

4. In a steam shovel, a dipper arm, a dipper hingedly connected to one end thereof, a crosshead mounted in longitudinally disposed guides carried by the dipper arm, a connecting rod journalled at one end to the dipper and at the other end to the crosshead, screvv means for reciprocating the crosshead and means for locking the crosshead at the innermost point of its travel.

5. In a steam shovel, a dipper arm, a dipper hingedly connected thereto, a crosshead mounted in guides carried by the dipper arm, a connecting rod j ournalled at one end to the dipper and at the other end to the crosshead, means for reciprocating the crosshead, a locking pin carried by the dipper arm and means for engaging said pin With the crosshead for locking. it at the rearmost point of'its travel.

6. In a steam shovel, a dipper arm, a dip per hingedly connected thereto, a crosshead mounted in guides carried by the dipper arm, a connecting rod journalled at one end to the dipper and at the other end to the crosshead, means for reciprocating the crosshead, locking pins carried by the dipper arm, means for projecting said pins into the path of the crosshead to engage its front end when the crosshead is at the rearmostfv point of its travel.

ROBERT HAMILTON LUTZ.

Vitnesses:

JOHN G. HAYWARD, NounnN CoLns. 

